Tying up a loose end of a long-running stem cell research fiasco, yet another RIKEN investigating committee released yet another report in Tokyo today. It concludes that the so-called stimulus-triggered acquisition of pluripotency stem cells, as well as the chimeric mice and teratomas supposedly derived from those cells, "all originated in cultures contaminated with cells, a fact that refutes all of the main conclusions of the two papers" that reported the the supposed breakthrough method of reprogramming adult cells.
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